The largest volcanic caldera in Japan holds an entire city in its maw.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

Japanese island famous for poison gas and fluffy bunnies.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

Once the most densely populated place in the world, this island is now a ghost town.

A magical place that lets you play in and explore the world of Studio Ghibli.

On Japan's Tashirojima Island, cats are king.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

Island wonderland for communist autocrats.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

A forgotten monument to Yugoslavian freedom.

A tribute to an iconic act of defiance from the Croatian War of Independence involving a small car.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

The only gulag ever to exist in socialist Yugoslavia.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

This huge metal monument is slowly being stripped to its concrete skeleton.